# encoding: utf-8


ptxt = input("请输入明文文本:")

for p in ptxt:			
	if 'a' <= p <= 'z':
		print(chr(ord('a') + (ord(p) - ord('a') + 3) % 26), end='')
	elif 'A' <= p <= 'Z':
		print(chr(ord('A') + (ord(p) - ord('A') + 3) % 26), end='')
	elif 0x4E00 <= ord(p) <= 0x9FA5:
		print(chr(ord(p) + 3), end='')
	else:
		print(p, end='')
		